<template>
	<view class="goods-detail-container">
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" circular>
			<swiper-item v-for="(item,index) in goods_info.pics" :key="index">
				<image class="image" :src="item.pics_big" @click="preview(index)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">&#165;{{goods_info.goods_price}}</view>
			<!-- 信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" color="gray" size="18"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递: 免运费 --- {{cart.length}}</view>
		</view>
		<!-- 商品的详情信息 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<!-- 商品导航组件 -->
		<view class="goods-nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup"
							@click="onClick" @buttonClick="buttonClick"></uni-goods-nav>
		</view>
	</view>
</template>

<script>
	import { mapState, mapMutations, mapGetters } from 'vuex'
	export default {
		data() {
			return {
				//商品详情
				goods_info:{},
				options:[
					{
						icon:'shop',
						text:'店铺'
					},
					{
						icon:'cart',
						text:'购物车',
						info:0
					}
				],
				buttonGroup:[
					{
						text:'加入购物车',
						backgroundColor:'#FF0000',
						color:'#FFF'
					},
					{
						text:'立即购买',
						backgroundColor:'#FFA200',
						color:'#FFF'
					}
				]
			}
		},
		onLoad(options){
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		computed:{
			//通过 ...mapState 方法，把myCart模块中cart数组映射到当前页面中
			//...mapState('模块的名称',['要映射的数据的名称', .......])
			...mapState('myCart',['cart']),
			...mapGetters('myCart',['total'])
		},
		watch:{
			//监听 total 值的变化，通过形参拿到改变之后的值
			//动态的为购物车徽标进行赋值
			// total(newVal){
			// 	const findResult = this.options.find((x) => x.text === '购物车')
			// 	if(findResult){
			// 		findResult.info = newVal
			// 	}
			// }
			total:{
				//handler 属性用来定义侦听器的function的处理函数
				handler(newVal){
					const findResult = this.options.find(x => x.text === '购物车')
					if(findResult){
						findResult.info = newVal
					}
				},
				immediate:true
			}
		},
		methods:{
			...mapMutations('myCart',['addToCart']),
			async getGoodsDetail(goods_id){
				const {  data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
				if(res.meta.status !== 200) return uni.$showMsg()
				//使用字符串方法 replace() 方法 为img标签添加一个行内的style样式
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g,"<img style='display:block'").replace(/webp/g,'jpg')
				this.goods_info = res.message
			},
			//实现轮播图的预览效果
			preview(index){
				//调用uni.previewImage 展示图片预览效果
				uni.previewImage({
					//预览时，默认现实图片的索引
					current:index,
					//所有url地址的数组
					urls:this.goods_info.pics.map(x => x.pics_big)
				})
			},
			onClick(e){
			console.log(e);
			if(e.content.text === '购物车'){
				uni.switchTab({
					url:'/pages/cart/cart'
				})
			}
			
		},
		buttonClick(e){
			if(e.content.text === '加入购物车') {
				const goods = {
					goods_id: this.goods_info.goods_id,//id
					goods_name: this.goods_info.goods_name,//名称
					goods_price: this.goods_info.goods_price,//价格
					goods_count: 1,//数量
					goods_small_logo: this.goods_info.goods_small_logo,//图片
					goods_state:true //商品勾选状态
				}
				//调用 这个映射过来的方法 把商品信息对象存到购物车数据当中
				this.addToCart(goods)
			}
		}
		},
		
		
	}
</script>

<style lang="scss">
.goods-detail-container{
	padding-bottom: 50px;
	swiper{
		height: 750rpx;
		.image{
			width: 100%;
			height: 100%;
		}
	}
	

.goods-info-box{
	padding: 10px;
	padding-right: 0;
	.price{
		color: #c00000;
		font-size: 18px;
		margin: 10px 0;
	}
	.goods-info-body{
		display: flex;
		justify-content: space-between;
		.goods-name{
			font-size: 13px;
			padding-right: 10px;
		}
		.favi{
			width: 120px;
			font-size: 12px;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			border-left: 1px solid #dadada;
			color: gray;
		}
	}
	.yf{
		margin: 10px;
		font-size: 12px;
		color: gray;
	}
	
}
	.goods-nav{
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
	}
}
</style>
